I think it is safe to assume that the UTVA-67 Privrednik II (400hp Lycoming O-720 and redesigned fuselage, larger hopper) was not built.
Thanks Walter. There is a certain amount of questionable information on the UTVA-67, but to quote an authorative work on the subject, in respect of the -67 "....was proposed....but did not reach prototype stage".
Here's something a little different, and probably very easy!
